As I have been working this glitch steadily since last July, I can confirm Pericles statement, except for
1) the 30 min thing. It's random: could be 5 min, could be an hour. Bizarrely, it even restarts AFTER the normal 2-hour block ends.
2) Seems "most of you know" is wrong (unless you, like me, have kept quiet). Most don't know, I've found, having done extensive searches here and on the wider web.
I have been reluctant to bring it up, as 1) it is probably a zero-sum game and 2) I thought that Blizz might do something about it. Given that this has gone on for at least 10 months, I now assume Blizz has just left it as an Easter egg, or other metaphor. Maybe Bigger-Fish-To-Fry? Is that expression used in the UK? They have to be aware.
I can write a detailed guide with tips, and answer questions. Of course, the US community would also want to see. Would it be better for the Royal Lounge? Maybe moderators can advise. Mods, PM if you like.